ALSA project - the C library reference

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Functions
Debug Functions
PCM Interface

## Functions
int | snd_pcm_dump (snd_pcm_t *pcm, snd_output_t *out)
| Dump PCM info.
int | snd_pcm_dump_hw_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current hardware setup for PCM.
int | snd_pcm_dump_sw_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current software setup for PCM.
int | snd_pcm_dump_setup (snd_pcm_t *pcm, snd_output_t *out)
| Dump current setup (hardware and software) for PCM.
int | snd_pcm_hw_params_dump (snd_pcm_hw_params_t *params, snd_output_t *out)
| Dump a PCM hardware configuration space.
int | snd_pcm_sw_params_dump (snd_pcm_sw_params_t *params, snd_output_t *out)
| Dump a software configuration.
int | snd_pcm_status_dump (snd_pcm_status_t *status, snd_output_t *out)
| Dump status.

## Detailed Description

See the PCM (digital audio) interface page for more details.

## Function Documentation

## ◆ snd_pcm_dump()

int snd_pcm_dump | ( | snd_pcm_t * | pcm,
|  | snd_output_t * | out )

Dump PCM info.

Parameters

  pcm | PCM handle
  out | Output handle

Returns
  0 on success otherwise a negative error code

Examples
  /test/latency.c, and /test/pcm.c.

## ◆ snd_pcm_dump_hw_setup()

int snd_pcm_dump_hw_setup | ( | snd_pcm_t * | pcm,
|  | snd_output_t * | out )

Dump current hardware setup for PCM.

Parameters

  pcm | PCM handle
  out | Output handle

Returns
  0 on success otherwise a negative error code

## ◆ snd_pcm_dump_setup()

int snd_pcm_dump_setup | ( | snd_pcm_t * | pcm,
|  | snd_output_t * | out )

Dump current setup (hardware and software) for PCM.

Parameters

  pcm | PCM handle
  out | Output handle

Returns
  0 on success otherwise a negative error code

## ◆ snd_pcm_dump_sw_setup()

int snd_pcm_dump_sw_setup | ( | snd_pcm_t * | pcm,
|  | snd_output_t * | out )

Dump current software setup for PCM.

Parameters

  pcm | PCM handle
  out | Output handle

Returns
  0 on success otherwise a negative error code

## ◆ snd_pcm_hw_params_dump()

int snd_pcm_hw_params_dump | ( | snd_pcm_hw_params_t * | params,
|  | snd_output_t * | out )

Dump a PCM hardware configuration space.

Parameters

  params | Configuration space
  out | Output handle

Returns
  0 on success otherwise a negative error code

## ◆ snd_pcm_status_dump()

int snd_pcm_status_dump | ( | snd_pcm_status_t * | status,
|  | snd_output_t * | out )

Dump status.

Parameters

  status | Status container
  out | Output handle

Returns
  0 on success otherwise a negative error code

Examples
  /test/latency.c.

## ◆ snd_pcm_sw_params_dump()

int snd_pcm_sw_params_dump | ( | snd_pcm_sw_params_t * | params,
|  | snd_output_t * | out )

Dump a software configuration.

Parameters

  params | Software configuration container
  out | Output handle

Returns
  0 on success otherwise a negative error code